I have a black Macbook (2.4ghz mb404) and I spilled something on it a while ago. I read the sticky and I took it to an apple store and it was cleaned and the logic board is fine. I have replaced the RAM and reset the PRAM and the mb will work fine for about a week. Then, every time I try to shut it down, the mb will restart itself. I have checked the applications that could force a restart and I have also created a new user account. Anyone have an idea of a fix I could make? Again, the logic board was tested and switched with another identical model and is fully functional. All of my ports and other integrated devices on the board work.